Sole-sewing machine.



T. G. PLANT.

SOLE SEWING MACHINE. APPLIOATION FILED mum, 190s. RENEWED APR. 14,1909.

Patented NOV. 16. 1909 4 SHEETS-SHEET 1.

T. G. PLANT. SOLE SEWING MACHINE. APPLICATION FILED FEBML 1908. RENEWEDAPR. 14,1909. 940,054. Patented Nov. 16, 1909.

4 SHEETS-SHEET 2.

.y 04 inventor Atty T. G. PLANT.

SOLE'SEWING MACHINE.

APPLICATION FILED FEBA, 190s. RENEWED APR. 14,1909.

Patented'Nov. 16. 1909.

4 SHBETSSHEET 3.

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T. G. PLANT. SOLE SEWING MACHINE. APPLIUATION FILED PEBA, 1908. RENEWEDAPR. 14,1909.

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fru/entai" r hoinasaPlant I -al lc results. retain the increased orclamping pressure of THOMAS G. PLANT, OF BOSTON, MASSACHUSETTS.

SOLE-SEWING MACHINE.

sienna.

Specification of Letters Patent.

Patented Nov. 16, 1909.

Application filed February 4, 1908. Serial No. 414.161. Renewed April14, 1909. Serial No. 489,893.

T all'whom it may concern:

Be it known that l. Tnoius G. PLANT, a citizen of the United States.residing at Boston. in the county of Suti'olk and State ofMassachusetts, have invented an improvement in Sole-Sewing Machines, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like numerals on the drawings representinglike parts.

The invention to be hereinafter described relates to sole sewingmachines of the gen eral type described in United States Letters PatentNo. 473,870, dated April 26, 1892. in machines of this type, the workhas been supported upon a stationary table and held in place by amovable presser foot capable of being locked in work clamping position,

- at which time. obviously, the work could notbe adjusted or itspositionchanged. It was ncces.-ar v. however, that he work be fed and alsoremoved from the machine. therefore. provision as made in said patentedma chine to release the clamping action of the presser toot when the awlwas in the work during the feeding movement and again at "the completionof each stitch formation.

. ever. neither the awl nor the needle was in the material. so thatmachine control of the work was lost. and it was liable to be moved bytheoperative with obviously objection- Attempts have been made to thepresser foot'upon the work, and the consequent machine control thereof.at. all times. except during the intervals of feed, and means have beenprovided under the control of the operative for unlocking the pressertoot atdesired times. In thus unlocking the presser foot betweenteedmovements b v these prior methods. however. it has been necessary toretain in action the devicesfor giving the increased pressure. in otherwords, it' the operative found it desirable to adjust. or manipulate thework, lic \\'a called upon to unlock the presser toot white theincreased pressure was maintained. and then hit the presser tootagainst. the force of the devices impartil'ig the increased pressure.

Vit'h these considerations in view. the present invention aims to doaway with the necessity of thus manipulating the presser foot while the.increased pressure is maintained, thus avoldmg stress upon themaclnneand operative; to provide means for relieving the increasedpressure prior to unbe made clearby the following descriptionandaccompanying drawing of one form or embodiment ot the invention and itsidentifyin g features.

In the drawings Figure 1 is an' end elevation of a sole sewing machineembodying the present invention. only sutlicient of the sewing devicesbeing illustrated to make clear, to one skilled in the art, thecornice-- tion and relation of the invention thereto, the presser tootbeing shown in raised position: Fig. 2 is a view similar to Fig l, withthe press-er foot in lowered and increased pressure position: Fig. 3 isa front elevation of the machine viewed from the left. Fig. 1, parts ofthe sewing instrumentalitics being omitted for clearness ofillustration. and a part of the frame being in section; Fig. 4

is a sectional detail on the line -l--l. Fig. .l'

5 is a sectional detail on the line Fig. 2: Fig. (3 is a section on thebroken line t2-6. I ig. 3, showing a form of reversing andstopping'device; and Fig. 7 is a detached detail of the slide andadjacent parts.

The machine frame 1 ma be of appropriate character to provide supportfor the working parts. Jourualed in bearings 2, 2, Fig. 3, is the mainshaft 4: having thereon the several cams 5, l0, 7 and Sfor impartingmotion to the machine elements.

' Referring to Figs. 1 and '2. the worktable 9 is appropriatelysupported from the frame work of the. machine. and may be as indicatedin Patent No. H3370 to which reference has been made. The presser foot10 is carried by an elbow shaped lever 11 loosel mounted upon a stud orlike appropriate support 12 projecting from a bracket 13 formed as partof or secured to the machine framing. At its rear end the lever 11 hasconnected to it a link ll. which extends looselv-through a lug 1.") onthe arm 16 also mounted .ioselv upon the support 12 or a suitable bossupon the lever 11. and above said lug the link it is surrounded lie ' edto be engaged by a washer 17, which is acted upon by a spring 18,adjustable as to its'force by a nut 19 screwed upon the end 20 of saidlink 14.

The rear end with ratchet teeth or a ratchet dog 21 adaptat times b oneor more 22, said pawls being (:arried by a lever 23, fulcrumed on themachine frame by means of a pin or stud 24. The rear end of the lever 11is likewise provided with ratchet teeth or a ratchet dog 25, adapted tobe engaged by pawls 26 mounted at27 upon the machine frame, said pawlshaving rearward extensions 28 adapted to be engaged by the widened end29 ofthe lever 23 when said lever is depressed to trip the pawls. A stud30' projecting from the machine frame serves to trip the 23 issufficiently depressed.

To the lever 11 at 32 is connected the vertically movable frame 31normally under pawls the lifting action of a suitable spring 33 tendingto maintain the presser foot in light engagement with the work. Thepawls 22 are engaged by aspring 35 carried by the lever 23 and saidspring acts to normally turn the pawls into engagement with the ratchetteeth or ratchet dog 21. acting on the pawls 26 normally turns them intolocking engagement with the ratchet teeth or ratchet dog 25. I

The parts so far described, with the exception of possible details as toform and the mounting of the spring 34, are and may be substantially aspointed out in Patent-No. 473,870.

Mounted loosely uponthe stud 24 is an said arm having secured thereto apin 37 carrying a roll 38 traveling in the cam path-39, Figs. 1 and 2,of a cam 40, secured to the main shaft '4.

Disposed. between the arm 36, and the substantially horizontal portionof the lever 23,,

is a slide 41 having the cam grooves or slots 42 and 43. These camslots, best, shown in Figs. 4, 5 and 7, extend longitudinally of theslide 41 and for part of their length are substantially straight ordevoid of relative divergence, but near the end of the slide,

the left end viewing Fig. 7 their relative divergence is greatest. Thepin 37, on the side of the arm 36 adjacent the slide 41, carries a roll44, 4 and 5, which travels in the groove or slot 42 of the slide 41; andthe lever 23, on the side adjacent the slide 41, carries a roll 45mounted on a pin or stud 16, said roll 45 traveling in the other grooveor slot 43 of the slide 41.. From this con struction it will be apparentthat the lever 23' derives motion from the cam groove 39 only throughthe arm 36 and interposed slide 41, and that movement 'of said slide 41longitudinally will turn the lever 23 upon its fulcrum by virtue of therelative divergence of the grooves or slots 42, 43. In

of the arm 16 is provided pawls 22 when-the lever A spring 34 thearrangement ofgrooves or slots illus trated, their relation is such thatupon moving the slide 41 forward, or from the posi tion shown in Fig. 2to that shown in Fig. 1, the lever arm 23 will be turned in a downwarddirectionupon itsfulcrum pin or stud 24; and by reverse movement of theslide said lever arm 23 will be raised. I This dire c tional movement isarbitrary, however, as it will be at once obvious that changes willsuggest themselves in carrying into practical formthis feature of theinvention.

The lever 23 is provided with a slot 47, Figs. 1 and 2, through whichprojects a pin 48 secured to the slide 41, said pin 48 preferablycarrying a. roller, as indicated. Pivoted to the machine frame at 49 isa shifting arm 50, the upper portion of which engages the pin 48'or-itsroller, preferably by means -of the bifurcated end portion 51, wherebymovement of the shifting arm 50 upon. its pivot longitudinally betweenthe lever 23 and the operating arm 36.

Mounted upon the a hand lever 52 portion, at 53, the link 54, whichextends rearward to and is connected with the shift ing arm 50 by a pin55, Figs. 2, 3, 4 and 5. The pin 55 projects beyond the nut 56, Figs. 3and 4, and has secured to itoneendofa spring 57 the other end beingconnected to a pin 58 secured to the main frame, said spring 57, Fig. 1,thus acting .to draw the arm 50 toward the rear,- as will be apparent.WVith the parts disposed as in Fig. 1, it will be apparent to thoseskilled in the art, that upon rotation of the shaft 4, the riser of thecam groove 39 acting upon the roll 38 of the ar'm 36 will cause thelever 23 to be depressed, thereby unlocking the pawls 22 and 26 from theratchet teeth or dogs 21 and 25 respectively, at which time the presserfoot is held in work engagement by the light spring 33 alone. formed andtimed with reference to the operation of the awl, that the aboveunlocked condition occurs when the awl has enteredthe material andcontinues during the feed' movement, and' then, preferably just prior tothe withdrawal of the awl, the action of thrcam groove 39 raises thelever 23 to biiug the presser' foot into position of increased pressure,where it may remain until after the awl has again penetrated the work.Thus, except when the awl is in the material or during the intervals offeed, the'presser foot is in position of increased pressure, due to theaction of the pawls, spring 18 and connections, as will be readilyunderstood by those familiar with this class of machines.

To release the work during intervals between feed movements, to put innew work, or to adjust the work for any purpose, as, for instance, whena thread breaks land a having jointed to its lower The parts are so 49will cause the slide 41 to. move' fresh start is to be made, it washeretofore necessary in this type of machine to unlock ahe presser footfrom its lower holding pawls while the Full increased pressure due tothe spring 18 was acting, and to then raise and hold the presser footagainst this pressure with one hand, while,. with the otheigthe shoemight be manipulated. In the present invention this condition isobviated, it-being only necessary to push the handle from the positionshown in Fig. :3 to that 1'. that. the link fi-L turns the arm upon itstulcrmn pin 49, thus moving the slide 41 forward into the positionindicated in Fig. l, which has the effect of lowering the lever 23. asdescribed, thus relieving the increased pressure of the presser foot inthe first instance by lowering the pawls 22, while still in engagementwith ratchet teeth 21,,the distance between the lower part of said pawlsand the pin 30, after which the pawls 22 are i ripped by the pin 30, andthe pa-Wls 26 are tripped to unlock the presse'r foot, Which is nowentir ly free with the exception of the be t s ngaction due to spring33. Thus it will oe'clear that the presser foot can be rel ased at anytime to permit adjustment of earl; and when so released or unlocked thatthe increased pressure is not maintained.

The work having been adjusted, it is desirable to reapply the increasedpressure, and lock the presser foot. This is done by the present.invention by movement of thehandle 52 from its position, Fig. 1, to thatof Fig. 2, such movement of the handle causing a reverse-action of theslide 41, so that as the diverging or cam portions of the slots orgrooves in the slide 41 act upon their associated rolls on the arm 36andlever 23 respectively, the latter is raised, thus allowing .thepawls'22 and 26 to engage their respective ratchet dogs, and then, byfurther upward movement of lever 23, to lift the end of the arm 16,-thereby applying the in creased pressu1",'th'e pawls 26,'at such time,again acting to lock the presser foot in such position of increasedpressure.

hen the handle 52 is moved to release tlw'presser toot, it is desirablethat it may be raised clear of the work at times. and as one means ofaccomplishing this result. there is, in the present invention, a stop orshoulvown in Fig. 1,.the result being der 5%). l*igs. l, 2 and 3, formedby a plate secured by screws (30, or otherwise, to the. presser tootlever 11, the construction being such that upon iea'rward movement ofthe. handle .32. said handle, after releasing the presscr foot both fromthe action of the increased pressure devices and its locking pa wls.will contact with the stop or shoulder 5.9 and raise the presser foot toits full} raised position, Fig. '1. such action being-effected againstthe light spring 33.

In order that the presser toot may be antomatically returned to itsposition of increased pressure and locked in such position, the tensionof the spring 57, acting to turn the shiftingarm :70, may be such as tomove the slide ell rearward when the handle 52 is released, with theresult. that the lever 23 will be raised, the pawls be thrown intoengagement with their ratchet dogs, the increased pressure berestoredand the presser foot be'locked in its position of increasedpressure.

\Vhen it becomes desirable to remove the work at. the end of asewingoperation and to place anew piece of work in the machine, obviously, theawl and needle must be out of the work and the presser foot must beraised, in other Words, the machine should be stopped or brought to restwith these parts in such predetermined position. To insure that thepress-er foot shall be released from its position of increased pressureand. unlocked, and that it be raised into substantially the positionindicated in Fig. 1, when the machine is finally brought. to rest, thepresent invention provides means, operative as the machine approachesits final stopping position, to automatically place the presser foot inthe desired relation with respect to the work.' As one means of securingthis end, provision is'made for reversing the action of the machineparts when a sewing operation is con'ipleted. such reversal beingutilized to move the slide l1 and depress the lever 23, as will now bedescribed.

shaft 4 has loosely mounted thereon a driv- Referring to Fi s. 3 and 6,the driving pivotally mounted on the machine frame 63,-

Fig. '3, one arm of which is provided with a yoke 64 engaging a ring-65loosely mounted on the hub 66 of the clutchmember (31;

the other arm 67 of said lever bein con-- nected at (38 to a treadle rod(39. Obviously, any well known means may be employed to shift the clutchmember 61.

Fixed to the shaft at, as by the key 70, is the fast 'clutch member 71,Figs. 3 and (3, suitable friction material 72 being interposedbetweenthe members 61 and Tl, so that the latter may be appropriatelydriven from the former when the two are brought together, as will bereadily understood. Loosely mounted on the hub 72", Fig. h. of theclutch member 71, a step arm 73 to which, at H. is secured one end of acoiled spring 75, the other end of said spring being secured to theclutch member 71. at 76. From this it will be clear with the machine inoperation that should the clutch member 61 be disengaged from the member71, and

the stop arm 73 be stopped from rotation i with member 71, the latterwill be moved for some distance by the momentum ofthe machine elements,thus winding up the spring 75, and that the tension of the wound springwill first bring the machine to a stop without shock and then reversethe same .until finallyarrested, as will now be explained.

A stud or pin 77, Fig. 6, secured to the machine frame extends parallelto thedrivshaft 4, and has mounted thereon a sleeve 78 free to turn andslide thereon.

Projecting from the sleeve 78 is an arm 7 9, carrying a stop fingerv 80,appropriately se-' The sleeve cured there by suitable bolts 81. 7 8 andstop finger 80. are normally influenced by a spring 82, see dotted linesing to move movable in the opposite direction by means of a bell cranklever 83, pivoted at 84 to the machine frame, and connected by a treadlerod 85 to a suitable treadle, not necessary to illustrate, butpreferably the same as that from the to'which the rod 69 is connected.

The stop arm 73 projects a short distance beyond the face of thecluteh"member 71, or as shown in Fig. 3, a little to the right thereof,so that if the stop finger is permitted to be moved by its spring 82 tothe left,

Fig. 3, it will be in position to be engaged by the advancing edge ofthe stop arm 73, and thus arrest its further movement; This position ofthe only be assumed when the clutch member '61 is disengaged from theother clutch memas stated, the rods 69 and 85 bar 71, since, areconnected to or operated by the same treadle.

- On the face of the clutch member 71 is a cam or stop '86, Figs. 3 and6. This cam stop 86, as shown in Fig. 3, does not extend face of theclutch member 71 as far as does'the stop arm 78, so that should thetreadle be released and thestop finger 80 be moved by its spring 82toward the face of the clutch member 71, the said stop finger will rideupon the. face of the said' clutch member and rise over the inclinedsurface 87 of the cam stop 86 and, upon being met by the stop arm 73,will arrest said stop arm as hereinbefore pointed out. The spring'75'having been wound or tensioned by the continued movement of the clutchmember 71 after the stop arm 73 has.

Fig. 3, tendthem to the left, Fig. 3, or to-v ward the face of clutchmember 71,a nd are strike the stopfinger 80 in tion,

stop finger, however, can

clearly understood by those clutch member '71 without shock, the arm 79,Fig. 6, has secured the'reto a brake-shoe 89, said brake-shoe beingpreferably adjustable on said arm as by the slot 90 and bolt 91.- Thus,as the stop arm 73 strikes the stop finger-80, it will turn the. sleeve78 about the stud 77 and apply the brake, the brake being normally heldfrom engagement with the clutch member 71 by means of a spring 92 Fig.'6, one end of which is secured to a pro-. jection 93 on the arm 79, andthe other end' to a pin 94 connected to the machine frame.

When the clutch member- 71 has been.

brought to rest and then reversed by the spring'7 5, the end 88 of thecam stop 86 will the reverse direcand to cushion this shock, the sleeve78 has projecting therefrom a toe 95 which 'bears upon a stop pin96contained in a seat 97 and normally held.- in its position by means ofa spring 98.

Mounted on the machine frame, Figs. 1

and 2, is a studshaft 99 carrying an arm 100 loosely mounted thereon,the lower end "of said arm being connected at 101 to a link 102 having abifurcated end 103engag1ng the shifting arm 50 preferably. bymeans of anextension .of the pin 57, as shown in Fi 1 and 5. said pin having a head1041 or maintaining the link 102m proper engage-,-

ment therewith.

Mounted upon a pin 105 carried at the upper end of the lever or arm 100is a dog 106 having at its end a. roll 107 bearingupon the peri hery-ofa camv 108 carried by the main sha 4. This dog 106 is normally actedupon by a spring 109, one end of which is connected to said dog at 110and the other to a pin 111 carried by a collar 112 on the stud shaft 99,the tendency of said spring being to. normally turn the dog from thedotted line position, Fig. 2, into its full line position, a stop 113being provided to limit the run of the ,dog in the direction of thearrow, Fig. 2.

From the construction described, it will be that during the normaloperation of the machine, the roll 107 on the dog 106 will ride idlyupon its cam 108, the spring 109 yielding as the riser of its cam passesunder the roller 107. On the reverse movement of the cam 108, however,the riser 108*, see dotted lines, Figs. 1 and 2, will act upon the dog106 in the reverse direction, and as said dog.

is now held from turning in the reverse directlon by means of the pm113, the riser skilled in the art 108* will move the lever 100 about itsstud shaft 99 as the riser of the cam 108 passes from the positionindicated in Fig. 2 to that indicated in' Fig. 1, the result being thatthe link 102 acting upon the shifting arm 50 will cause the'slide 41 tobe moved forward and to the'left from the position shown in 2 to thatshown in Fig. 1, with the result that the increased pressure upon thepresser foot will first be released,then', the presser foot will beunlocked, and by further move mentof the slide and shifting arm 50, thelink 54: will turn the handle about its fulcrum 12-, causing ittocontact with the stop 59 and thereby raise the presser foot entirelyfrom the work. The operation of the machine will be clear to thoseskilled in the art without further elucidation, it being noted that whenthe treadle is depressed, it will act through the treadle rods 69 mil 85to cause the clutch member 61 to be thrown into engagement with theclutch member 71,

and simultaneoasly therewith the bell crank 83, through its pinconnection 11-1 with the sleeve 78, will cause the stop finger 80 to bewithdrawn from its stopping position. At each rotation of the mainshaft, thelever 23 will be operated to release the presser foot from itsposition of increased presure duringthe intervals of feed,-and should itbe desirable at any time to adjust the work upon the table, or if forany reason it bee'o'mes desirableto raise the presser foot, the handle52 can be moved by the attendant from the position shown in Fig. 2. tothat shown in Fig. 1, the result of which is that the increased pressureupon the presser foot will first be relieved altogether, and, then, thepresser foot will be unlocked further movement of the handle 52 causingthe presser foot to be lifted clear of the work. On releasing the handle52, the presser foot will be again restored to its position of increasedpressure and locked in such position, preferably by means of the spring57, as herein.- before explained. On the completion of a sewingoperation, the attendant will release the treadle with the result thatthe clutch members will be disengaged, and the stop finger 80 will moveto the left, Fig. 3, to be engaged by the stop arm 73, the momentum ofthe machine carrying the clutch member 71 a part of the revolution untilthe spring 75stops and reverses the clutch member and the machine parts,bringing them to rest in a predetermined position, as before noted. Thisreverse motion of the machine parts and the driving shaft 4 causes theriser 108* to act upon the dog 106, and, through the connecting devices,as already described, move the slide 41, thereby relieving the presserfootfrom increased pressure, unlocking it, and raising it to a positionfree of the work.

Vhile the present invention has been described in detail as embodied inthe mechanical structures herein selected forillustrative purposes, itis to be understood that the invention and its identifying.characteristics are not circumscribed by these details, which may bevaried. It is believed to be broadly nei'v in a machine of this generalcharacter to provide means for giving to a presser foot a position ofincreased PI'QSSUL" and locking the same, and to provide means for firstrelieving the presser foot of its increased pressure and then unlockingit so that it may be moved at any time free of the work, whether by theoperative or by the action of the me. chanical parts themselves.

Claims.

1. in a sole-sewing machine, the combination with a -work support, of amovable presser-foot, means to force said resser-foot against the workon the work support with a normally light'pressure, means to increase.said pressure at intervals. and to lock said presser-foot when theressure has been increased, and means an er control of the operative tosuccessively release. the pr'esserfoot. from increased pressure and tounlock the prcsser-i'oot.

2. In asole-sewing machine, the combination of a work support, a movablepresserfoot, means to force said presser-foot against the work on thework support with a normally light pressure, means to increase saidpressure at intervals and to lock said presserfoot when the pressure hasbeen increased, means under control of the operator to release thepresser-foot from increased pres-- sure and then unlock thepresser-foot, and to restore such increased pressure and lock thepressure. p p v 3. In a sole-sewing machine, thecombination of a worksupport, a movable presserfoot, means to force said pressenfoot againstthe work on the work support with a. normally light pressure, means toincrease said pressure at intervals and to lock said pre'ss'erfoot whenthe pressure has been increased, meansunder control of the operator tore lease the presser-foot from increased pres sure and thereafter unlockthe presser-foot, and automatically acting means to restore suchincreased pressure and lock thep'resser foot in its position ofincreased pressure.

4. In a sole-sewing machine, the combination with a work support, of amovable presser-foot, means to force said presserfoot.

against the work on the work support with a normally lightpressure,means to increase said pressure at intervals and to lock saidpresser-footwhen the pressure has been increased, means under control ofthe operator to release the presser-foot from increased pressure and tothereafter unlock the presser foot, and means for thereafter lifting thepresser foot from the work 5. 'In a sole-sewingmachine, the combinationof a work support, a movable presserfoot, means to force thepresser-footagainst the work on the work support with a normally lightpressure, means to increase said pressure at intervals and to lock theresserfoot 'in its position of increased pressure, means operative bystopping the machine to pre'sse'r foot again in its position ofincreased a normally light pressure, means to increase said pressure atintervals and to lock the presser-foot in its position of increasedpressure, means for reversing the movement of the shaft, and meansoperative on such reverse movement to release the presser foot fromincreased pressureand to unlock the presser-foot.

7. In a sole-sewing machine, the combination with a work support, of amovable presser-foot, a spring acting with a normally light tension toforce the presser-foot against the work on the work support, means toincrease'the pressure of the pres'ser-foot upon the work at intervalsand to lock the PT GSSEF-fOOt in position of increased pressure, andmeans under control of the operative to first relieve the presser-footof said increased pressure and thereafter unlock said resser-foot.

8. In a sole-sewing machine, the combination with a work support, of amovable resser-foot, a spring acting with a normally light tension toforce the presser-foot against the work on the work support, means toincrease the pressure of the presser-foot upon'the work at intervals andto lock the resser-foot in position of increased pressu e, means undercontrol of the operative to first relieve the pressenfoot ofsaid'increased pressure and 'thereafter to unlock said presser-foot,andmeans to automatically rcstore the increased pressure of thepresser-foot and to lock said presser-foot in position of increasedpressure.

9. A sole-sewing machine comp 'ising, in combination, a work support,feeding devices to move the work at intervals, a presserfoot, means toproduce pressure of the presser-foot upon thework; means to increasesaid pressure of the presser-foot at intervals and to lock thepresser-foot in position of increased pressure during inter 'als between'teed'mm'ements, means under control of the operator to relieve thepresscr-foot from such increased pressure and to then unlock thepresser-foot atdesircd times during the intervals between foodmovements, and means to automatically restore the increased pressure ofthe presser-foot and to lock the press'er-foot in positidn.

10. A sole-sewing machine having in combination a driving shaft, a camoperated thereby, a work support, a presser-foot normally held againstthe work with a light pressure, means including a lever operated atintervals from said cam to increase the pressure of the presser-footupon the work and to lock the presser-foot in. osition of increasedpressure, and means ormoving said lever independent of the camforreleasingthe increased pressure of the pre'sserfoot and unlocking thesame.

11. A sole-sewing machine having, in combination, a shaft, driving andstopping means therefor including means for rovers ing the rotationofsaid shaft as the ma chine is finally brought to rest, a cam on saidshaft, a work support, a presser-footnormally held in light contact withthe work, means to increase the pressure of the presser-foot upon thework at intervals and lock it in position of increased pressure, andmeans rendered effective by the said cam upon reverse movement thereofto release the increased pressure of the presser-foot and unlock thesame.

12. In a sole'-sewingmachine,the combination of a shaft, driving andstopping means therefor including means for reversing the I rotation ofsaid shaft as the machine is finally brought to rest, a work support, apresser-foot normally held in light contact with the work on saidsupport, a lever, lever operating means for periodically moving saidlever from said shaft to increase the pressure of the resser-foot andlock it in position of increased pressure, and means operative onreverse movement of said shaft for moving said lever independentof saidlever operating means to release increased pressure of th\e presser-footand unlock the same.

13, In a machine of the character described, the combination of adriving shaft, starting and stopping mechanism therefor, a work support,a. presser-foot and means to force it with a light pressure upon thework placed on said support, means including a lever and its actuatingcam operated from the driving shaft to increase the pressure of thepresser-foot upon the work at. intervals and to lock the presser-foot inposition of increased pressure, means independent of said actuating camfor moving said lever to release the presser-foot from its position'ofincreased pressure and to unlock the same as the machine is stopped andto restore said increased pressure and lock the presser-foot in itsposition of increased pressure wheu' said shaft at intervals, a pawlmovable with said lever, means operated by said pawl for impartingincreased pressure to the presser foot, a locking awl for holding thepress-01 foot in pos tion of increased pressure. and

means under control of the operative to successively relieve the presserfoot of increased pressure and to unlock said locking'pawl.

15. in a sole sewing machine, the' combination of a driving shaft, arelatively m ov able work support and presser-foot, means to relativelymove said work support and resser-foot to hold the work between them1neans to increase the pressure of the work support and resser-foot uponthe work, means for rever'slng' the movement of the driving shaft, andmeans operative on such reverse movement to release thework from saidincreased pressure.

16. In a sole-sew1ng machine, the comb nation of a driving shaft, arelatively movable work-support and presser-foot, means for relativelymoving said work-support and presser-foot to hold the work between them,means to increase the pressure of the work-supportand resser-foot uponthe work, means for arresting the driving shaft and causing its movementto be reversed and the machine stopped witlr the parts in predeterminedposition, and means operative on such reverse movement to re lease thework from said increased pressure. In testimony whereof, I have signedmy name to this specification, in the presence of

